Composite RGB image of G289.6+5.8 showing the large-scale radio structure of the remnant. The image combines the ASKAP-EMU 944 MHz total intensity map (red and blue) with WISE 12 μm emission (green). To emphasise the structure of the source, the radio image is displayed in two different scalings: the red layer uses a linear stretch to highlight the bright filaments and central region, and the blue layer uses a logarithmic stretch to enhance the low surface brightness emission. The 15" synthesised beam is shown in the lower left corner. The γ-ray source IGR J11187-5438 lies within the compact nebula at the centre of the shell.